Polarization. After seeing how Islam creates muslim good, non-muslim evil view of life, and Israel is creating Jew good, palistinian evil, you have a continual generation of hatred on both sides which is exploited by politicians.
The violence and hatred in Gaza is terrible, as well as the suffering for generations of young people. The fact that the faiths support such a polarization, along with statement from Iran they will wipe Israel of the face of the map, encourage extreme idiologies within Israel. Now I believe in the rights of a country to defend itself, but slow demolishing of the west bank, and conquering of land, is just occupation by an aggressive force. Without Israel becoming a pluralistic country with equal rights for all its citizens the end is bad. No politician in the free world will be able to support this situation forever, and Israel will be abandoned. Look at the history of the US. It is based on defending the rights of the individual against the state.